EP1046826A2 - Vis à béton - Google Patents

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Publication number
EP1046826A2
EP1046826A2 EP00108229A EP00108229A EP1046826A2 EP 1046826 A2 EP1046826 A2 EP 1046826A2 EP 00108229 A EP00108229 A EP 00108229A EP 00108229 A EP00108229 A EP 00108229A EP 1046826 A2 EP1046826 A2 EP 1046826A2
Authority
EP
European Patent Office
Prior art keywords
thread
notches
screw according
concrete screw
concrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00108229A
Other languages
German (de)
English (en)
Other versions
EP1046826A3 (fr
Inventor
Andreas Wunderlich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adolf Wuerth GmbH and Co KG
Original Assignee
Adolf Wuerth GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adolf Wuerth GmbH and Co KG filed Critical Adolf Wuerth GmbH and Co KG
Publication of EP1046826A2 publication Critical patent/EP1046826A2/fr
Publication of EP1046826A3 publication Critical patent/EP1046826A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0026Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a hard non-organic material, e.g. stone, concrete or drywall
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0047Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge being characterised by its cross-section in the plane of the shaft axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0042Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
    • F16B25/0052Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the ridge having indentations, notches or the like in order to improve the cutting behaviour

Definitions

  • a known concrete screw of this type has a double thread present, the two courses of which are different Have outside diameter (DE 33 01 414 A1).
  • the invention has for its object a concrete screw to create the improved retention properties with improved Screw-in properties combined.
  • the invention proposes a concrete screw with the features of claim 1. Training the invention are the subject of the dependent claims, their wording as well as the wording of the summary is made by reference to the content of the description.
  • the screw according to the invention has a Training with the edge flattened, i.e. in an area. This area is at least approximate in a cylindrical surface, preferably in a common one Cylinder surface around the axis of the screw. However, it can also slight deviations from this cylinder surface are provided his.
  • the ratio of Outside diameter of the thread to the core diameter of the screw is in the range of about 1.32 to about 1.42, which Range of values for thicker screws at smaller values can be shifted, for example with screws Sizes 10 and 12 mm range from 1.26 to 1.34. It has pointed out that this ratio is a particularly favorable one Value with regard to the strength of the screw connection represents.
  • the ratio of Outside diameter of the thread to the pitch of the thread in Range is from about 1.34 to about 1.45.
  • the thread flanks of those proposed by the invention Screw preferably close an angle of about 18 to 25 degrees with each other, with the cheapest value in the range of about 20 degrees.
  • the thread flanks are arranged symmetrically to each other, so the screw has symmetrical thread.
  • the notches proposed by the invention are designed in such a way that they are arranged in the thread flank, so that the outer contour of the thread does not change. The flattened The thread edge of the thread is therefore still there on the cylinder surface without the flattened thread edge deviates inwards.
  • the notches can be provided from the shaft of the screw to the outer edge of the thread extend.
  • the notches in both thread flanks are arranged alternately, preferably in such a way that the notches of a thread flank in the circumferential direction seen midway between the notches of the other thread flank are arranged.
  • the notches are the same Have a distance from each other.
  • the invention proposes that the notches have a bottom can, which is approximately parallel to the respective thread flank runs in which the notches are arranged. In order to is achieved that the notch is the same depth everywhere having.
  • the Notches are bounded by side walls that run approximately radially and / or are trained.
  • the side walls with the floor the notches form a right angle.
  • all the notches over the entire length of the Screw have the same depth, but at least in one specific area of the screw.
  • the first threads for example, the first four threads, usual Have cutting notches that notch the thread completely, so that the thread edge is no longer in the Cylinder surface lies, but deviates inwards.
  • the width of the notches measured in the circumferential direction can be approximately be three times the thickness of the flattened thread edges.
  • Figure 1 shows a side view of one of the invention Proposed concrete screw, which at its top in Figure 1 End is provided with a screw head 1. With the screw head it is a common hexagon head. The Screw head is formed at the end of the screw shaft 2, the one directly adjacent to the screw head 1 Area is thread-free. In the rest of the area the shaft 2 is provided with a thread 3, which up to the screw tip 4 slightly tapered in diameter enough. In the first four threads, the thread instructs known notches. The thread has a relative small width in relation to the pitch.
  • Figure 2 shows an end view of the thread.
  • the outside edge 5 of the thread lies in an end view on a circular arc around the axis of the screw.
  • individual notches 7 are formed, of which in Figure 2, a complete and half shown is.
  • the notches have a bottom 8 and two side walls 9 on.
  • the side walls 9 run radially, so that the Width of the notches 7, that is to say their extent in the circumferential direction, somewhat enlarged from the inside out.
  • the notches run from the shaft 2 to the outer edge 5 of the thread.
  • Thread flank 10 also shown in dashed lines Notches 7 on.
  • the notches 7 of a thread flank 6 lie in the middle between the notches 7 of the other thread flank 10th
  • Figure 3 is a section through a thread placed in a place where there is no notch is.
  • the thread is symmetrical.
  • the two Thread flanks 6, 10 close an angle of approximately 20 Degrees with each other. Both thread flanks run in the cut 6, 10 rectilinear and go in an edge 11 in the cylindrical screw shaft 2 over.
  • the thread flanks 6, 10 converge outwards, they do not meet in a thread edge, but end beforehand in a surface 12 that is straight in section, the boundary line parallel to the longitudinal axis the screw is arranged.
  • the surface section 12 lies in a cylinder surface. Since preferably all threads have the same outer diameter, the Surface sections 12, the two thread flanks 6, 10 connect with each other in a common cylinder surface concentric to the axis of the screw.
  • FIG. 4 shows a section corresponding to FIG. 3 another point on the thread.
  • a notch 7 is present in one thread flank 6.
  • the floor 8 of the notch runs parallel to the thread flank 6 both sides of the notch 7. Therefore, the notch 7 has the everywhere same depth.
  • the notch is designed to be up to the surface section 12 is sufficient, which also at the point of Notch 7 still has a finite width, so still does not form a thread edge.
  • the width of the surface 12 on this Place is about a third of its width at the places where there is no notch, see Figure 3.
  • FIG. 5 now shows a development of the surface section 12, so the "flattened thread edge". It is from the two Thread flanks 6, 10 limited, which contain the notches 7.
  • the surface section 12 therefore has a different one Width up, with the decrease in width alternating up one and the other is done.
  • the mouth the notches 7 in the surface section 12 is of a rectangle formed with 13 short edges with its short sides that is screwing the concrete screw into the wall facilitate and improve the drilling.
  • the "flattened thread edge” 12 runs not continuous here, but has gaps in which the surface section 14 connecting the thread flanks 6, 10 at a reduced distance from the core of the thread or the shaft 2 of the screw. This makes a tooth-like Thread formed, that is, no continuous thread edge has more.
  • the notches 7 are the two thread flanks 6, 10 formed in the same place. Other training would also be possible here.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Dowels (AREA)
EP00108229A 1999-04-17 2000-04-14 Vis à béton Withdrawn EP1046826A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999117469 DE19917469A1 (de) 1999-04-17 1999-04-17 Betonschraube
DE19917469 1999-04-17

Publications (2)

Publication Number Publication Date
EP1046826A2 true EP1046826A2 (fr) 2000-10-25
EP1046826A3 EP1046826A3 (fr) 2001-11-28

Family

ID=7904970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108229A Withdrawn EP1046826A3 (fr) 1999-04-17 2000-04-14 Vis à béton

Country Status (2)

Country Link
EP (1) EP1046826A3 (fr)
DE (1) DE19917469A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007406A1 (de) * 2011-04-14 2012-10-18 TOGE-Dübel A. Gerhard KG Gewindeschneidende Schraube

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10252774A1 (de) * 2002-11-07 2004-05-27 Adolf Würth GmbH & Co. KG Schraube für harte Werkstoffe
DE102006000539A1 (de) * 2006-12-19 2008-06-26 Hilti Ag Befestigungselement

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3301414A1 (de) 1982-02-11 1983-08-18 Illinois Tool Works Inc., 60631 Chicago, Ill. Betonschraubenanker

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1004883A (en) * 1962-03-20 1965-09-15 Res Eng & Mfg Improvements in self-tapping screws
GB1120991A (en) * 1965-02-02 1968-07-24 G K N Screws And Fasteners Ltd Improvements relating to wood screws
US3742541A (en) * 1970-12-10 1973-07-03 S Ohmoto Tool for forming internal screw-threads and method of making the same
DE8103990U1 (de) * 1981-02-13 1982-09-30 Jaeger Eberhard Gmbh & Co Kg, 5928 Laasphe Selbstfurchende Schraube
FR2673251B1 (fr) * 1991-02-25 1994-07-08 Legrand Sa Vis, en particulier vis a fut creux du type vis cheville pour materiau tendre.
DE9108879U1 (de) * 1991-07-19 1991-10-02 Reisser - Schraubenwerk GmbH + Co, 7118 Künzelsau Gewindeformende Schraube
DE9103773U1 (de) * 1991-03-27 1992-07-30 Reisser - Schraubenwerk GmbH + Co, 7118 Künzelsau Gewindeformende Schraube
DE29704226U1 (de) * 1996-07-29 1997-05-28 TOGE-Dübel A. Gerhard KG, 90431 Nürnberg Selbstschneidende Schraube, insbesondere Betonschraube
AU712854B2 (en) * 1996-07-29 1999-11-18 Toge-Dubel A. Gerhard Kg Self-tapping screw, in particular concrete screw
DE19724052A1 (de) * 1997-06-07 1998-12-10 Wuerth Adolf Gmbh & Co Kg Schraube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3301414A1 (de) 1982-02-11 1983-08-18 Illinois Tool Works Inc., 60631 Chicago, Ill. Betonschraubenanker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007406A1 (de) * 2011-04-14 2012-10-18 TOGE-Dübel A. Gerhard KG Gewindeschneidende Schraube

Also Published As

Publication number Publication date
EP1046826A3 (fr) 2001-11-28
DE19917469A1 (de) 2000-10-19

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